The protection of computer systems and information from threats such as theft or data destruction.

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6answers
2k views

Is it dangerous if you drop a metal object(like a screw) on a motherboard that is powered on?

I am not very good with electricity so I can only guess. So should i be careful with screws and stuff when the pc is on?
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3answers
3k views

How to secure a public computer?

We'll have a couple of laptops sitting at a table at a convention we're going to soon. We're not concerned about physical theft - the laptops will be physically secured, and there'll be someone ...
1
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1answer
291 views

Public WiFi Security [duplicate]

Possible Duplicate: SSH from public network? How does a hacker in a public WIFI actually view your computer? HTTPS in public wireless network: is it ok I have heard and read about public ...
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3answers
174 views

HTTPS in public wireless network: is it ok

When I am using public WiFi to go to a secured site that uses HTTPS, is my data encrypted? Is it a lot more risky than when I am on a secured network ?
1
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1answer
185 views

How to secure a laptop against thieves [duplicate]

Possible Duplicate: What are the possible ways for prevention of laptop theft? Hi ! I'm looking for some security hw/sw based solution for my laptop (non standard solution maybe? open the ...
1
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1answer
1k views

Is Microsoft Security Essentials a solid security suite [duplicate]

Possible Duplicate: Would Microsoft Security Essentials be adequate protection? With the release of Microsoft's new Free security suite; Microsoft Security Essentials, the question has to be ...
1
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2answers
784 views

SSH behind proxy ?

What is the best way to SSH to my sever behind company proxy , it seems that 22 port is not opened by default , is there any simple way to do that rather than to install corkscrew ?? When I do : ✗ ...
1
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2answers
8k views

How can I get my router and Inprocomm IPN2220 wireless network card connected?

Problem I can not connect to my Techniclan WAR-54G router's personal wireless network via my older Acer Travelmate 2300 XP Pro laptop that uses a InProComm IPN2220 wireless network card. However, ...
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2answers
6k views

Wireless network connection: Security Type: Unsecure

For some wireless network connections, Windows 7's connection choice menu shows a warning sign with text: information sent over this network might be visible to others. What does this mean? How risky ...
1
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1answer
414 views

Mail-inbox shows a mail sent from its own mail-address without having sent it

I just signed up for a seminar on a website I usually can trust. I filled out some information for this, also containing my iCloud-mailadress. I did that on a MBP running OS 10.11 in Safari. After ...
1
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1answer
264 views

What communication can be intercepted by network I'm connected over VPN to?

I have to connect to client's network over VPN, and I was wondering if the client can intercept (and read) my Google Talk messages (or any other IM communication) while I'm VPN-ing. My main concern ...
0
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2answers
362 views

Cleaning up a compromised Windows 7 laptop

OS: Windows 7 Home Premium Machine: Dell Inspiron N7010 Incident : User indicated that after clicking through what he later realized was a bogus Anti-Virus install message all his documents had '...
0
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0answers
95 views

Automate Interactive method of authentication for file transfer

Interactive method of authentication There is a server A and Server B Server A is the File Transfer server It has the files stored in it and we issue command scp admin@IP of REMOTE server/...
601
votes
18answers
70k views

How are pseudorandom and truly random numbers different and why does it matter?

I've never quite got this. Just say you write a small program in any language at all which rolls some dice (just using dice as an example). After 600,000 rolls, each number would have been rolled ...
340
votes
12answers
17k views

How can I give my wife emergency access to logins, passwords, etc.?

I'm the digital guru in my household. My wife is good with email and forum websites, but she trusts me with all our important digital stuff — online banking and other things that require ...
71
votes
5answers
96k views

How to password protect gzip files on the command line?

I want to create some tar.gz (and possibly tar.bz2) files, using the tar command on Ubuntu 10.04. I want to password protect the file. What is the command to do this (I have Googled, but found ...
121
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5answers
12k views

How to identify whether my Linux computer was hacked?

My home PC is usually on, but the monitor is off. This evening I came home from work and found what looks like a hack attempt: in my browser, my Gmail was open (that was me), but it was in compose ...
71
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13answers
118k views

Which TrueCrypt Algorithm is the safest?

If performance is of no concern, which TrueCrypt algorithm is the safest to use? AES Serpent Triple DES Twofish AES-Twofish AES-Twofish-Serpent Serpent-AES Serpent-Twofish-AES Twofish-Serpent
35
votes
4answers
85k views

SSH: The authenticity of host <host> can't be established

What does this message mean? Is this a potential problem? Is the channel not secure? Or is this simply a default message that is always displayed when connecting to a new server? I am used to ...
26
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3answers
60k views

Disable Windows 7's “Open File - Security Warning” dialog for exe on network drive?

I have a mapped network drive, on which I store some programs, one of which I've put in my startup folder. Unfortunately, this program "does not have a valid digital signature", which means that ...
77
votes
10answers
19k views

How to destroy a CD/DVD rom safely?

I have old CDs/DVDs which have some backups, these backups have some work and personal files. I always had problems when I needed to physically destroy them to make sure no one will reuse them. ...
17
votes
6answers
5k views

How to set up simple VPN for secure Internet connections over unencrypted Wi-Fi?

I recently moved into an apartment where the complex provides free unencrypted Wi-Fi. The speed is good for my purposes, but I'm not 100% comfortable with all my traffic being sent in the clear, given ...
63
votes
3answers
147k views

What is 1e100.net and why do I have TCP ports open to it?

I see my PC has TCP connections open to 1e100.net. Then I checked the whois record and find it is registered to Google. Weird. A quick search seems to indicate that 1e100.net is pretty popular - ...
21
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3answers
17k views

Can other people on an encrypted Wi-Fi AP see what you're doing?

If you connect to an open, unencrypted Wi-Fi access point, everything you do can be captured by other people within range. If you connect to an encrypted point, then people nearby can intercept what ...
41
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1answer
46k views

How do I view the contents of a PFX file on Windows?

I have a PFX certificate file on my machine and I'd like to view the details before importing it. (The import utility doesn't actually tell you what the certificate is!). How do I view the details ...
88
votes
3answers
51k views

“Google Software Update would like to control this computer…” What?

For the first time (that I've seen), some piece of Google's software updater is now asking for permission to control my computer. I couldn't find any other mention of this on the web, so I don't ...
78
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2answers
8k views

What makes Secure Login (CTRL+ALT+DEL) Secure?

I was reading about enabling CTRL+ALT+DEL as a security measure when logging in. My question is, what exactly is secure about it? What goes on "behind the scenes" that makes it safe from viruses and ...
47
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1answer
10k views

Why does Google call Thunderbird “less secure”?

I've never had problems using Gmail with Thunderbird yet, but while trying to use a free software client for Google Talk/Chat/Hangout I've discovered that, according to Google's document on "less ...
28
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2answers
7k views

I'm using Chrome and Chrome Sync; does Google have access to my passwords?

I've been using Chrome (and Chrome Sync) for many years now. Does that mean Google, the owner of Chrome, knows all my passwords? I ask because I realized that Google owns Chrome, and also, it is a ...
23
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3answers
15k views

Do I need to have a passphrase for my SSH RSA key?

Before I started at my current job (at a small business), my office had no firewall on the network and literally nothing was ever being backed up. Now that I've signed on as a dedicated sysadmin / one-...
30
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3answers
13k views

Why is SSH key authentication better than password authentication?

This isn't so much a technical question as it is conceptual. I understand the cryptography used in an SSH key is far stronger than a regular password, but I don't understand why it is considered more ...
27
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17answers
8k views

How can I physically destroy data from a failed HDD?

I have a broken HDD that contains sensitive data. Since no software can access the disk, I can't wipe it using any of the tools generally suggested. Breaking the disk physically into very small ...
13
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3answers
9k views

Change EUID of running process

On Linux, how can I change EUID of running process from command line (provided I have root access)?
6
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10answers
313 views

What are the guidelines for creation of a secure passwords?

What are the best practices to create secure passwords? I would like to make them tougher to crack with brute force tools. Part II Are there any tools that can generate these passwords so I do not ...
19
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2answers
4k views

How big of a risk are popular Chrome extensions?

I'm about to switch to Chromium and I installed a couple of extensions. Each time I installed an extension I was notified of which data the extension has access to, e.g.: I do understand that ...
19
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4answers
2k views

What are ways to prevent files with the Right-to-Left Override Unicode character in their name (a malware spoofing method) from being written or read?

What are ways to avoid or prevent files with the RLO (Right-to-Left Override) Unicode character in their name (a malware method to spoof filenames) from being written or read in a Windows PC? More ...
19
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2answers
14k views

fine-grained sudoers configuration (allowed commandline arguments)

is there a straight-forward way to allow a user to run (for example) /usr/bin/pacman -S -u as root, without allowing him to run /usr/bin/pacman -S -u some_package ? The line user ALL=(root) ...
12
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2answers
64k views

How can I use Event Viewer to confirm login times filtered by User?

I'm required to log my start and finish times at work. Occasionally I forget to do this and had a bright idea that checking the Security events log would allow me to retrospectively ascertain my times....
9
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1answer
762 views

“Panic Password” on Linux

I run Linux on my netbook with an encrypted home directory (decrypted when I log in). One idea I had (partly from Cory Doctorow's Little Brother) was to have a password that I could enter which would ...
4
votes
4answers
10k views

What are reasons to disallow ICMP on my server?

An EC2 Instance has ICMP services disabled by default. While it's not totally clear to me why, I think it's because it could be a potential security risk. At the moment I'm enabling Echo Responses ...
16
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4answers
48k views

Force Chrome to Ignore a "weak ephemeral Diffie-Hellman public key”

With the update of Chrome to v45, it's blocking access to pages with weak ephermeral Diffie-Hellman public keys. I understand that this is due to Logjam. I understand that switching from https to http ...
11
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5answers
3k views

Does NAT provide security?

I'm following discussions about the IPv4->IPv6 transition, and IPv6 doesn't seem to like NAT at all. I've always thought that NAT was helpful in v4 for some security, I know it doesn't really hide ...
8
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5answers
9k views

Is there a point to using theft tracking software like Prey on my laptop, if you have login security?

Hey, so I have a Thinkpad that I use in a variety of places (coffee shops, work, etc.). I don't generally abandon it, but I figure there's a chance I might get careless and it gets stolen at some ...
8
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2answers
5k views

How does the “Steam” platform work? Is it DRM? Can I trust “Steam”-powered software? [closed]

UPDATE: This question lives on at gaming.stackexchange.com. So – I just bought the new game Supreme Commander 2. This question is not about the game, but about the online software ...
7
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4answers
2k views

Is it possible for hackers to steal password stored in your browser?

I was just wondering if Windows XP passwords can be hacked. Then why can't a hacker just hack my passwords stored in my browser? Is it possible for someone to know my browser-saved password ...
4
votes
18answers
997 views

Is free security software as good as paid security software? [closed]

I mostly use free security solutions to protect my home PC, but I wonder if I would get better protection from a paid solution. I prefer the free software, since I can have multiple applications ...
29
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9answers
82k views

Windows 7 never remembers my password credential

Every time I need to connect to something in my company I get a dialog like this So I type in my password(this can popup when I am in IE 9 or outlook or whatever.) and check the box. Say I am in IE ...
27
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6answers
2k views

Is BCCing e-mails guaranteed to be reliable?

In other words is it a safe assumption that no-one of recipients will ever see e-mails in BCC? What if the recipient is an administrator of his (but not sender's) mail server and can do any ...
26
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4answers
3k views

Why erase file with random patterns instead of all 0's or 1's?

Computer files aren't actually removed when they are deleted on Windows. The address pointer is simply released and that space freed for overwrite later. For sensitive information, it is recommended ...
16
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6answers
6k views

How can visiting a webpage infect your computer?

My mother's computer recently became infected with some sort of rootkit. It began when she received an email from a close friend asking her to check out some sort of webpage. I never saw it, but my ...